EP1965418A1 - Formule pour éliminer les résines photosensibles, les résidus de gravure et les couches BARC - Google Patents

Formule pour éliminer les résines photosensibles, les résidus de gravure et les couches BARC Download PDF

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Publication number
EP1965418A1
EP1965418A1 EP07250875A EP07250875A EP1965418A1 EP 1965418 A1 EP1965418 A1 EP 1965418A1 EP 07250875 A EP07250875 A EP 07250875A EP 07250875 A EP07250875 A EP 07250875A EP 1965418 A1 EP1965418 A1 EP 1965418A1
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EP
European Patent Office
Prior art keywords
formulation
acid
photoresist
water
aminobenzothiazole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07250875A
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German (de)
English (en)
Inventor
Matthew I. Egbe
Michael Walter Legenza
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Air Products and Chemicals Inc
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Air Products and Chemicals Inc
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Filing date
Publication date
Application filed by Air Products and Chemicals Inc filed Critical Air Products and Chemicals Inc
Priority to EP07250875A priority Critical patent/EP1965418A1/fr
Publication of EP1965418A1 publication Critical patent/EP1965418A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
    • H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
    • H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
    • H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
    • H01L21/3105—After-treatment
    • H01L21/311—Etching the insulating layers by chemical or physical means
    • H01L21/31127—Etching organic layers
    • H01L21/31133—Etching organic layers by chemical means
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/26—Organic compounds containing oxygen
    • C11D7/263—Ethers
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/32—Organic compounds containing nitrogen
    • C11D7/3281—Heterocyclic compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/34—Organic compounds containing sulfur
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/26—Processing photosensitive materials; Apparatus therefor
    • G03F7/42—Stripping or agents therefor
    • G03F7/422—Stripping or agents therefor using liquids only
    • G03F7/425—Stripping or agents therefor using liquids only containing mineral alkaline compounds; containing organic basic compounds, e.g. quaternary ammonium compounds; containing heterocyclic basic compounds containing nitrogen
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02041—Cleaning
    • H01L21/02057—Cleaning during device manufacture
    • H01L21/0206—Cleaning during device manufacture during, before or after processing of insulating layers
    • H01L21/02063—Cleaning during device manufacture during, before or after processing of insulating layers the processing being the formation of vias or contact holes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02041—Cleaning
    • H01L21/02057—Cleaning during device manufacture
    • H01L21/02068—Cleaning during device manufacture during, before or after processing of conductive layers, e.g. polysilicon or amorphous silicon layers
    • H01L21/02071—Cleaning during device manufacture during, before or after processing of conductive layers, e.g. polysilicon or amorphous silicon layers the processing being a delineation, e.g. RIE, of conductive layers
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/14—Hard surfaces
    • C11D2111/22—Electronic devices, e.g. PCBs or semiconductors

Definitions

  • the polymeric organic substance is a photoresist material. This is a material which will form an etch mask upon development after exposure to light. In subsequent processing steps, at least a portion of the photoresist is removed from the surface of the substrate.
  • One common method of removing photoresist from a substrate is by wet chemical means.
  • the wet chemical compositions formulated to remove the photoresist from the substrate should do so without corroding, dissolving, and/or dulling the surface of any metallic circuitry; chemically altering the inorganic substrate; and/or attacking the substrate itself.
  • Another method of removing photoresist is by a dry ash method where the photoresist is removed by plasma ashing using either oxygen or forming gas such as hydrogen.
  • the residues or by-products may be the photoresist itself or a combination of the photoresist, underlying substrate and/or etch gases. These residues or by-products are often referred to as sidewall polymers, veils or fences.
  • RIE reactive ion etching
  • complex semiconductor devices such as advanced DRAMS and microprocessors, which require multiple layers of back end of line interconnect wiring, utilize RIE to produce vias, metal lines and trench structures.
  • Vias are used, through the interlayer dielectric, to provide contact between one level of silicon, silicide or metal wiring and the next level of wiring.
  • Metal lines are conductive structures used as device interconnects.
  • Trench structures are used in the formation of metal line structures.
  • Bottom antireflective coating (BARC) and gap fill materials which are typically highly cross-linked organic polymer materials, are widely used in semiconductor substrates containing copper. BARC materials may also contain, for example, silicon.
  • metal lines and trench structures typically expose metals and alloys such as Al-Cu, Cu, Ti, TiN, Ta, TaN, W, TiW, silicon or a silicide such as a silicide of tungsten, titanium or cobalt.
  • the RIE process typically leaves a residue that may include re-sputtered oxide material as well as possibly organic materials from photoresist and antireflective coating materials used to lithographically define the vias, metal lines and or trench structures.
  • the formulation disclosed herein is capable of selectively removing residues such as, for example, photoresist, ion implanted photoresist, gap fill, BARC and/or other polymeric material, and/or inorganic material and processing residue from a substrate without attacking to any undesired extent metal, low-k dielectric, and/or high-k dielectric materials that might also be exposed to the formulation.
  • the formulation for removing photoresist, etch residue or BARC comprises: an ammonium salt and 2-aminobenzothiazole, and water.
  • a preferred formulation comprises: tetramethyl ammonium hydroxide, tolyltriazole, propylene glycol, 2-aminobenzothiazole, dipropylene glycol monomethyl ether, remainder water; more preferably: tetramethyl ammonium hydroxide 1-15 wt %, tolyltriazole 1-5 wt%, propylene glycol 5-15 wt%, 2-aminobenzothiazole 1-10 wt%; dipropylene glycol monomethyl ether 20-45 wt%, remainder water.
  • a specific more preferred formulation comprises: tetramethyl ammonium hydroxide 6.5 wt %, tolyltriazole 3 wt%, propylene glycol 10 wt%, 2-aminobenzothiazole 6 wt%; dipropylene glycol monomethyl ether 39 wt%, remainder water.
  • Another specific more preferred formulation comprises: tetramethyl ammonium hydroxide 5 wt %, tolyltriazole 3 wt%, propylene glycol 12.13 wt%, 2-aminobenzothiazole 1.5 wt%; dipropylene glycol monomethyl ether 40 wt%, remainder water.
  • the invention is also a method of removing materials selected from the group consisting of photoresist, etch residue, BARC and combinations thereof, from a substrate comprising: applying a formulation, described above, to the substrate to remove the material from the substrate.
  • a formulation and method comprising same for selectively removing residues such as, for example, photoresist, ion implanted photoresist, gap fill, bottom antireflective coating (BARC) and other polymeric materials and/or processing residues such as the residues generated by etching are described herein.
  • typical contaminants to be removed may include, for example, organic compounds such as exposed and/or ashed photoresist material, ashed photoresist residue, UV- or X-ray-hardened photoresist, C-F-containing polymers, low and high molecular weight polymers, and other organic etch residues; inorganic compounds such as metal oxides, ceramic particles from chemical mechanical planarization (CMP) slurries and other inorganic etch residues; metal containing compounds such as organometallic residues and metal organic compounds; ionic and neutral, light and heavy inorganic (metal) species, moisture, and insoluble materials, including particles generated by processing such as planarization and etching processes.
  • residues removed from the substrate comprise silicon-containing BARC residues.
  • the residues are typically present in a substrate that may also includes metal, silicon, silicate and/or interlevel dielectric materials such as, for example, deposited silicon oxides and derivatized silicon oxides such as HSQ, MSQ, FOX, TEOS and spin-on glass, chemical vapor deposited dielectric materials, low-k materials and/or high-k materials such as hafnium silicate, hafnium oxide, barium strontium titanate (BST), TiO 2 , TaO 5 , wherein both the residues and the metal, silicon, silicide, interlevel dielectric materials, low-k and/or high-k materials will come in contact with the cleaning formulation.
  • metal, silicon, silicate and/or interlevel dielectric materials such as, for example, deposited silicon oxides and derivatized silicon oxides such as HSQ, MSQ, FOX, TEOS and spin-on glass, chemical vapor deposited dielectric materials, low-k materials and/or high-k materials such as hafnium silicate, hafnium
  • the formulation and method disclosed herein provide for selectively removing the residues such as photoresist, ion implanted photoresist, BARC, gap fill, and/or processing residues without significantly attacking the metal, silicon, silicon dioxide, interlevel dielectric materials, low-k and/or high-k materials.
  • the substrate may contain a metal, such as, but not limited to, copper, copper alloy, titanium, titanium nitride, tantalum, tantalum nitride, tungsten, and/or titanium/tungsten alloys.
  • the formulation disclosed herein may be suitable for substrates containing sensitive low-k -films.
  • the substrate may comprise a low-k material, a high-k material, or combinations thereof.
  • a formulation for removing residues from a substrate comprising BARC the formulation comprising: dipropylene glycol monomethyl ether; tetramethyl ammonium hydroxide; tolyltriazole; propylene glycol; 2-aminobenzothiazole and deionized water. More preferably the formulation is dipropylene glycol monomethyl ether 20-45 wt%; tetramethyl ammonium hydroxide 1-15 wt%; tolyltriazole 1-5 wt%; propylene glycol 5-15 wt%; 2-aminobenzothiazole 1-10 wt% and remainder deionized water.
  • a specific more preferred formulation comprises: tetramethyl ammonium hydroxide 6.5 wt %, tolyltriazole 3 wt%, propylene glycol 10 wt%, 2-aminobenzothiazole 6 wt%; dipropylene glycol monomethyl ether 39 wt%, remainder water.
  • Another specific more preferred formulation comprises: tetramethyl ammonium hydroxide 5 wt %, tolyltriazole 3 wt%, propylene glycol 12.13 wt%, 2-aminobenzothiazole 1.5 wt%; dipropylene glycol monomethyl ether 40 wt%, remainder water.
  • the hydroxide should have no more than 100 ppm contamination of metals such as K, and Na.
  • the formulation disclosed herein is free of an oxidizer, abrasive particles, or any additional component that adversely affects the stripping and cleaning ability of the formulation or damages one or more surfaces of the underlying substrate.
  • oxidizers include, but are not limited to, hydrogen peroxide (H 2 O 2 ), monopersulfates, iodates, magnesium perphthalate, peracetic acid and other per-acids, persulfates, bromates, periodates, nitrates, nitric acids, iron salts, cerium salts, Mn (III), Mn (IV) and Mn (VI) salts, silver salts, Cu salts, chromium salts, cobalt salts, halogens hypochlorites and mixtures thereof.
  • abrasive particles examples include diamond particles and metal oxides, borides, carbides, alumina, ceria and silica and mixtures thereof.
  • the formulation is used to remove residues such as abrasive particles contained within CMP solutions from CMP processing. It is preferable that the formulation disclosed herein is free of such particles.
  • the formulations disclosed herein comprise an ammonium salt, preferably in an amount of 1-15% by weight, and 2-aminobenzothiazole, preferably in an amount of 1-10% by weight.
  • ammonium salt should be understood as encompassing both substituted and unsubstituted ammonium salts.
  • the ammonium salt is a quaternary ammonium salt, more preferably a tetramethyl ammonium salt.
  • Preferred salt forms are the hydroxide and fluoride salts. Most preferably the ammonium salt is tetramethyl ammonium hydroxide, tetramethyl ammonium fluoride, or a mixture thereof. Water is also present in the formulation disclosed herein.
  • Water is present in amounts ranging from 1 % to 95%, or from 1 to 75%, or from 1 to 50% by weight. It can be present incidentally as a component of other elements, such as for example, an aqueous solution comprising the fluoride ion source or quaternary ammonium compound, or it can be added separately.
  • aqueous solution comprising the fluoride ion source or quaternary ammonium compound, or it can be added separately.
  • Some non-limiting examples of water include deionized water, ultra pure water, distilled water, doubly distilled water, or deionized water having a low metal content.
  • the formulation disclosed herein may contain an organic solvent that is preferably water soluble as an optional component.
  • the water soluble organic solvent may be present in amounts ranging from 0 % to 60%, or from 0 to 55%, or from 0 to 50% by weight.
  • water soluble organic solvents include, but are not limited to, dimethylacetamide (DMAC), N-methyl pyrrolidinone (NMP), dimethylsulfoxide (DMSO), dimethylformamide, N-methylformamide, formamide, dimethyl-2-piperidone (DMPD), tetrahydrofurfuryl alcohol, glycerol, ethylene glycol, and other amides, alcohols or sulfoxides, or multifunctional compounds, such as hydroxyamides or amino alcohols.
  • DMAC dimethylacetamide
  • NMP N-methyl pyrrolidinone
  • DMSO dimethylsulfoxide
  • DMPD dimethylformamide
  • DMPD dimethyl-2-piperidone
  • water soluble organic solvents include diols and polyols such as (C 2 - C 20 ) alkanediols and (C 3 - C 20 ) alkanetriols, cyclic alcohols and substituted alcohols.
  • Particular examples of these water soluble organic solvents include propylene glycol, tetrahydrofurfuryl alcohol, diacetone alcohol and 1, 4-cyclohexanedimethanol.
  • the organic polar solvent may be DMSO, NMP, and/or DMAC.
  • the water soluble organic solvents enumerated above may be used alone or in a combination of two or more solvents.
  • the water soluble organic solvent may comprise a glycol ether.
  • glycol ethers include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monoisopropyl ether, diethylene glycol monobutyl ether, diethylene glycol monoisobutylether, diethylene glycol monobenzyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, triethylene glycol monomethyl ether, triethylene glycol dimethyl ether, polyethylene glycol monomethyl ether, diethylene glycol methyl ethyl ether, ethylene glycol monomethyl ether acetate, ethylene glycol monethyl ether acetate, propylene glycol methyl methyl ether,
  • the formulation may optionally include from 0.1 % to 5% by weight of a substituted hydroxylamine or an acid salt thereof.
  • exemplary hydroxylamines include diethylhydroxylamine and the lactic acid and citric acid salts thereof.
  • the formulation may optionally include an organic acid.
  • the organic acid is present in amounts of from 0% to 10%, or from 0% to 5%, or from 0% to 2% by weight of the formulation.
  • Exemplary organic acids include, but are not limited to, citric acid, anthranilic acid, gallic acid, benzoic acid, malonic acid, maleic acid, fumaric acid, D,L-malic acid, isophthalic acid, phthalic acid, and lactic acid.
  • the formulation described herein may optionally include one or more corrosion inhibitors.
  • the corrosion inhibitor is present in amounts of from 0% to 20%, or from 0% to 10%, or from 0% to 5% by weight of the formulation.
  • suitable corrosion inhibitors include, but are not limited to organic acid salts, catechol, benzotriazole (BZT), resorcinol, other phenols, acids or triazoles, maleic anhydride, phthalic anhydride, , pyrogallol, esters of gallic acid, carboxybenzotriazole, fructose, ammonium thiosulfate, glycine, tetramethylguanidine, iminodiacetic acid, dimethylacetoacetamide, trihydroxybenzene, dihydroxybenzene, salicyclohydroxamic, and mixtures thereof.
  • the formulation may also include one or more of the following additives: surfactants, chelating agents, chemical modifiers, dyes, biocides, and other additives.
  • Additives may be added to the formulation described herein provided that it does not adversely affect the stripping and cleaning ability of the formulation or the integrity of the underlying metal, silicon, silicon dioxide, interlevel dielectric materials, low-k and/or high-k materials. For example, if the formulation is used to treat a substrate containing copper, the formulation does not include additional additives that would increase the copper etch rate of the formulation.
  • Some examples of representative additives include acetylenic alcohols and derivatives thereof, acetylenic diols (non-ionic alkoxylated and/or self-emulsifiable acetylenic diol surfactants) and derivatives thereof, alcohols, quaternary amines and di-amines, amides (including aprotic solvents such as dimethyl formamide and dimethyl acetamide), alkyl alkanolamines (such as diethanolethylamine), and chelating agents such as beta-diketones, beta-ketoimines, carboxylic acids, mallic acid and tartaric acid based esters and diesters and derivatives thereof, and tertiary amines, diamines and triamines.
  • acetylenic alcohols and derivatives thereof acetylenic diols (non-ionic alkoxylated and/or self-emulsifiable acetylenic diol surfactants
  • Formulations disclosed herein are compatible with substrates containing low-k films such as HSQ (FOx), MSQ, SiLK, etc.
  • the formulations are also effective in stripping photoresists including positive and negative photoresists and plasma etch residues such as organic residues, organometallic residues, inorganic residues, metallic oxides, or photoresist complexes at low temperatures with very low corrosion of copper, and/or titanium containing substrates.
  • the formulations are compatible with a variety of metal, silicon, silicon dioxide, interlevel dielectric materials, low-k and/or high-k materials.
  • a photoresist layer is coated on the substrate.
  • a pattern is defined on the photoresist layer.
  • the patterned photoresist layer is thus subjected to plasma etch by which the pattern is transferred to the substrate.
  • Etch residues are generated in the etch stage.
  • Some of the substrates used in this invention are ashed while some are not ashed.
  • the main residues to be cleaned are etchant residues. If the substrates are not ashed, then the main residues to be cleaned or stripped are both etch residues and photoresists.
  • the method described herein may be conducted by contacting a substrate having a metal, organic or metal-organic polymer, inorganic salt, oxide, hydroxide, or complex or combination thereof present as a film or residue, with the described formulation.
  • the actual conditions e.g. temperature, time, etc., depend on the nature and the thickness of the material to be removed.
  • the substrate is contacted or dipped into a vessel containing the formulation at a temperature ranging from 20°C to 85°C, or from 20°C to 60°C, or from 20°C to 40°C.
  • Typical time periods for exposure of the substrate to the formulation may range from, for example, 0.1 to 60 minutes, or 1 to 30 minutes, or 1 to 15 minutes.
  • the substrate may be rinsed and then dried. Drying is typically carried out under an inert atmosphere.
  • a deionized water rinse or rinse containing deionized water with other additives may be employed before, during, and/or after contacting the substrate with the formulation described herein.
  • the formulation can be used in any method known in the art that utilizes a cleaning fluid for the removal of photoresist, ion implanted photoresist, BARC, ash or etch residues and/or residues.
  • etch rates on blanket low k dielectrics are provided in Table 2.
  • measurements were conducted at 5, 10, 20, 40, and 60 minutes of exposure at a temperature of 40°C.
  • Thickness measurements were determined at each time interval and graphed using a "least squares fit" model on the results for each exemplary composition.
  • the calculated slope of the "least squares fit" model for each composition is the resultant etch rate provided in angstroms/minute ( ⁇ /min).
  • the wafers had a blanket layer of a known thickness deposited on Si wafer. The initial thickness was determined using a FilmTek 2000 SE Spectroscopic Ellipsometer/Reflectomer.
  • test wafers were immersed in the exemplary compositions. After five minutes, the test wafers were removed from the test solution, rinsed for three minutes with deionized water and completely dried under nitrogen. The thickness of each wafer was measured and if necessary the procedure was repeated on the test wafer.
  • Examples A, B, D, E, and F were evaluated for low-k compatibility. However, example C was not evaluated for low-k compatibility. However, all six examples were evaluated for their ability to remove photoresist, BARC, and post-etched residues as shown in table 3. Based on the results obtained on patterned wafer, example C did not damage the porous ILD, and was effective in removal of the photoresist and the BARC material.
  • Table 3 illustrates the effectiveness of preferred compositions for removing photoreisit, BARC and etch residues from test substrate.
  • the wafer had 193 nm photoresist layers, 193 nm BARC layer, unknown Ultra low-k layer and silicon oxide layer.
  • the substrate was then processed by immersing the substrate in the preferred compositions. In this procedure, one or more test wafers were placed in a 600 milliliter (ml) beaker that contained 400 mls of each composition. The 600 ml beaker further included a 1 inch (2.5 cm) stir bar that rotated at 400 revolutions per minute. The compositions having the wafer(s) contained therein were then heated at the time and temperature provided in Table 3.
  • the wafer was rinsed with deionized water and dried with nitrogen gas.
  • the wafer was cleaved to provide an edge and then examined using scanning electron microscopy (SEM) on a variety of pre-determined locations on the wafer and the result of the cleaning performance and damage to the underlying interlayer dielectric (ILD) were visually interpreted and coded as provided in Table 3 in following manner: for cleaning "+” indicates excellent, "P” indicates partial removal and "-” indicates poor and for ILD damage "+” indicates no damage and "-” indicates damage.
  • SEM Results temperature °C time minutes photoresist BARC ILD clean clean damage A 40 15 + P - B 40 15 + + + C 40 15 + + + D 40 15 + P + E 40 15 + + + F 40 15 + + + + +
  • examples C, B, D, E and F did not damage the porous ILD. All six examples were effective in removal of the photoresist. On the other hand, examples B, C, E and F were effective in the removal of the BARC material.

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EP07250875A 2007-03-02 2007-03-02 Formule pour éliminer les résines photosensibles, les résidus de gravure et les couches BARC Withdrawn EP1965418A1 (fr)

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EP07250875A EP1965418A1 (fr) 2007-03-02 2007-03-02 Formule pour éliminer les résines photosensibles, les résidus de gravure et les couches BARC

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101493294B1 (ko) * 2012-10-08 2015-02-16 에어 프로덕츠 앤드 케미칼스, 인코오포레이티드 두꺼운 필름 레지스트를 제거하기 위한 스트리핑 및 세정 조성물
JP2015505886A (ja) * 2011-12-16 2015-02-26 ワッカー ケミー アクチエンゲゼルシャフトＷａｃｋｅｒ Ｃｈｅｍｉｅ ＡＧ シリコーン可溶化剤
US10952430B2 (en) 2019-02-06 2021-03-23 Virox Technologies Inc. Shelf-stable antimicrobial compositions
US12089590B2 (en) 2019-02-06 2024-09-17 Virox Technologies, Inc. Shelf-stable antimicrobial compositions

Citations (5)

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Publication number Priority date Publication date Assignee Title
EP1610185A2 (fr) * 2004-06-15 2005-12-28 Air Products And Chemicals, Inc. Composition et procédé utilisant cette composition pour éliminer des résidus d'un substrat
US20060014391A1 (en) * 2004-07-14 2006-01-19 Kyung-Jin Lee Method of manufacturing a semiconductor device using a cleaning composition
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